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Proving surjectivity of some map from a power set to a subset of integers.
How do I find the solutions of $|x-2|^{10x^2-1}=|x-2|^{3x}$?
Let $ \mathcal{T}= \{A \subset \{1,2,\ldots,9 \} \ ; \ |A|=5 \}$. Find $n_{\min}$...
How to construct a normal to side $AB$ of acute triangle so that it halves it area?
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